The domain would be (negaive infinity, positive infinity)
Answer:
the mean is 83.6
Step-by-step explanation:
Answer:
I think it's the last to they sound way more independent!!!
Answer:
The wavelength, of a sound wave with a frequency of 20 waves per second is 15,000,000 m.
Step-by-step explanation:
In this question, we have to calculate the wavelength of a sound wave of frequency 20 waves per second.
We know that the speed of light in air/ vacuum is
.
Now by the formula v = nλ , where v = speed of light in air/vacuum, n = frequency of the wave and λ = wavelength in meters,
we put the values
= 20 × λ
λ = 
λ = 15,000,000 m
The area would be 6 x 3= 18
18/2 = 9
The are of the triangle is B) 9
Hope this helps :)